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KLE/NFELOER (�H e a l t h& Safety Procedure HSP-5-07 Version 10 NOISE AND HEARING Number: Number: PROTECTION Published Revised Date: 5/4/2018 Date: N/A • Caring for and maintaining noise and hearing protection as instructed, guarding them against damage, and storing them in clean, sanitary locations. • Informing Supervisor or the VP of Health and Safety of any noise and hearing protection issues that they feel are not adequately addressed in the workplace, and of any other concerns that they have regarding this program. 5-07.5 Permissible Exposure Limits The permissible exposure limits (PEL's) in Table I refer to sound pressure levels and durations of exposure that represent conditions under which it is believed that nearly all workers may be repeatedly exposed without adverse effect on their ability to hear and understand normal speech. These levels shall not be exceeded as determined by an 8- hour time weighted average (TWA 8) exposure (see note below). When the 8-hour time weighted average is in excess of the PEL, engineering or administrative controls should be implemented. PPE, such as ear muffs or plugs are only used as temporary means of protection or where other means are not feasible. 5-07.5.1 Noise Exposure Limits When daily noise exposure is composed of two or more periods of noise exposures of different levels, their combined effect should be considered, rather than the individual effect of each. If the sum of the following fractions: C,/T,+C2/T2+...An/Tn,exceeds unity, then, the mixed exposure should be considered to exceed the limit value: • An indicates the total time of exposure at a specified noise level • Tn indicates the total time of exposure permitted at that level The values in Table 1 apply to total duration of exposure per working day regardless of whether this is one continuous exposure or a number of short-term exposures, but does not apply to impact or impulsive types of noise. Copyright 2019 Kleinfelder, Inc. Page 3 of 9 Important: When modifying this document, update properties with your name, date, and nature of changes made.